I am using Csound version 5.09 beta (float samples) Sep 13 2008 on a fresh machine and portaudio is working fine? In the float version anyhow. Here is a snapshot of teh output: 4: EDIROL UA-25 5: SigmaTel C-Major Audio 6: EDIROL UA-25 PortAudio: selected output device 'EDIROL UA-25' writing 20-byte blks of shorts to devaudio SECTION 1: ftable 1: new alloc for instr 1: Rory. 2008/9/24 Oeyvind Brandtsegg > I can only get it to work in realtime with MME audio out (-+rtaudio=mme), > portaudio does not work (-+rtaudio=pa). > >